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Segment Information - International Net Sales (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
May 03, 2020
Feb. 02, 2020
Nov. 03, 2019
Aug. 04, 2019
Apr. 28, 2019
Jan. 27, 2019
Oct. 28, 2018
Jul. 29, 2018
May 03, 2020
Apr. 28, 2019
Apr. 29, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]                      
net sales $ 47,378 $ 68,518 $ 69,550 $ 70,719 $ 67,023 $ 73,127 $ 72,275 $ 68,898 $ 256,166 $ 281,325 $ 323,725
North America (Excluding USA) [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
net sales [1]                 27,637 29,247 27,844
Far East and Asia [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
net sales [2]                 36,470 39,277 40,671
All Other Areas [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
net sales                 2,986 3,712 5,681
International [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
net sales                 $ 67,093 $ 72,236 $ 74,196
[1] Of this amount, $21.7 million, $22.5 million, and $21.9 million are attributable to shipments to Mexico in fiscal 2020, 2019, and 2018, respectively
[2] Of this amount $21.4 million, $29.8 million, and $32.6 million are attributable to shipments to China in fiscal 2020, 2019, and 2018, respectively